The Memorial Cloister is located in a corridor between a small courtyard and the cathedral itself. If you enter the cathedral's foyer from Avenue George V, the cloister is diagonally opposite of the entrance.

(Note: The Memorial Cloister is not open to the public in the same way as the cathedral and you must ask the attendant to unlock the door.)

Monument
The Memorial Cloister is a collection of engravings dedicated to American military units and civil organizations that were engaged in the First World War. Other plaques in the cloister commemorate the sacrifice of American service members during both world wars and the soldiers who are interred in overseas American cemeteries in Europe. Each unit or organization is honored with its insignia, name, and the number of officers and soldiers or members who were killed during the First World War. The engravings are organized by unit number and begin at the back of the cloister (the opposite end of the hallway from the entrance) and advance in a left-to-right and top-to-bottom manner.